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In planning, operating and developing mobile data networks, one crucial factor is the telecommunication demand that includes number of subscribers and their required service data rates. This demand should be predicted accurately to capture the subscribers' needs to create customer satisfaction. In the Ethiopian context, Ethio Telecom is the sole telecom service provider with over 50 million subscribers...
Using voice service on a mobile phone over long term evolution (LTE) mobile network has changed the way to service voice call in the legacy networks. Due to the LTE mobile network structure is accommodated specific for data and no circuit switch for voice call services. Therefore, the usage of voice services is necessary and needed to find out how to support voice services on LTE network. This paper...
To provide support for both data and voice is essential requirement of present mobile networks both LTE and UMTS networks. The proposed scheme in this paper differentiates assignment of requested calls on: speed, direction of motion and type of requested call. It also checks the used capacity threshold of LTE and UMTS before assignment. Different communication interfaces are used in hybrid mobile...
In the past few years, the telecommunications field experienced a rapid evolution on two main grounds: Multiple mobile network interface terminals, and mobile radio technologies. The needs of the users in terms of flow and mobility are in constant increase, making it necessary to develop a new generation of networks. The latter would be a heterogeneous wireless environment in which different access...
When several networks (e.g., Wi-Fi, UMTS, and LTE) cover the same region, the mobile terminals that are equipped with multiple network interfaces provide the possibility for mobile end-users to select their believed best network. This is known as the network selection problem, which is a decision making problem with multiple criteria (network conditions, service requirements, terminal characteristics,...
Mobile telephony based on UMTS uses finite-state control schemes for wireless channels and for signaling across the network. These schemes are used systematically in various phases of the communication and are vulnerable to attacks that can bring down the network through unjustified bandwidth allocation and excessive signaling across the control plane. In this paper we identify those system parameters...
During base station subsystem (BSS) or radio access network (RAN) construction, the system capacity is planned according to the expected traffic volume in the coverage areas. When the traffic volume is within the planned capacity, the system can provide services properly. However, in certain situations, such as major events or in dense destinations, the traffic volume sometimes exceeds the planned...
In Heterogeneous Wireless Networks (HWNs), the mobile terminals are equipped with multiple access network interfaces (GSM, UMTS, LTE, WiFi, Bluetooth, etc.), to provide the possibility for mobile end-users to rank the networks and dynamically select the best one at anytime and anywhere, which is well known as Always Best Connected (ABC). In such environment, the major issue is network interface selection,...
This paper presents the methodology employed and findings of the mobile technologies performance for Internet services in Bangkok, Thailand. The measurements involved the latency, user data rates, and speed tests. The performance comparisons were conducted among Thai major mobile network operators in the two frequency bands 850/900MHz and 2100MHz in Thailand. The findings indicated that not only Thai...
The small cell deployment is seen as a promising solution for the network operators to help them cope with the increasing number of mobile broadband data subscribers and their bandwidth-intensive application demands. The result is a HetNet, heterogeneous network environment with a combination of macro-cells and small cells to spread the traffic load, increase the bitrates and maintain the service...
Location search (LS) is used to discover the presence of a mobile terminal (MT) in a cell. When a call arrives for an MT, the cellular network first identifies the location area (LA) of the MT using the entries in Home Location Register (HLR) and Visitors Location Register (VLR). Next, the network pages the whole LA, which is a contiguous collection of cells, to spot the exact cell of residence of...
Mobile communications have known an impressive development in recent years, and are characterized by a trend towards broadband communications and extremely diverse applications. For some of these applications, such as financial transactions, shopping or online social networks, security is of extreme importance. This paper presents a survey of the most important and most vulnerable part of the security...
In most service provider networks today, performance enhancing proxies (PEPs), or optimization platforms, are used to improve performance through content caching, compression, application acceleration etc. PEPs are commonly deployed in wireline network ISPs and mobile networks between the core and Internet access point. This paper describes an alternative approach, which is to deploy content caches...
To keep “Always-on”, terminals contact with remote servers by sending the keep-alive messages (or heartbeat messages). Any message in data plan can be sent if and only if the RRC (Radio Resource Control) connection1 is built. Keep-alive messages are transmitted periodically, which leads to periodic establishment of RRC connections in some cases. High frequency of state transition may induce heavy...
Long-term evolution (LTE) is a broadband wireless communication standard evolved from the Universal Mobile Telecommunications System (UMTS) network. A report from GSA (Global mobile Suppliers Association) said that there are 274 LTE networks have been launched in 101 countries until 2014 Feb [1]. This paper describes the background and current situation of voice over LTE (VoLTE) technology in LTE...
The power levels of cellular network User Equipment (UE) may vary considerably in both the receiver and the transmitter side, especially in indoor locations. With an indirect guidance method, the users are self-optimizing their UE to a better location with the help of an application. Thus, the user distribution is weighted more on high quality connection areas, which results in saving the UE batteries...
Driven by a combination of flat lining revenues and an explosive growth in the mobile data traffic and hence the need for network resources, mobile operators consider infrastructure-and spectrum sharing as a means to reduce operational costs. We develop and apply an assessment approach to quantify the benefits associated with spectrum sharing in an infrastructure-shared environment, and estimate the...
In this paper, multiple handoff decision criteria to permit connectivity across UMTS and WLAN/WiMAX under the mobile IP regional registration (MIP-RR) are presented. Handoff decision is based on the predicted received signal strength (RSS) of neighbor networks and dwell time. The merit values of candidate networks are compared to select an optimal network. RSS prediction and handoff decision performances...
With the wide deployment of 3G/4G cellular data networks there is a tremendous growth of mobile Internet access worldwide. We conduct a detailed measurement study about user behaviors, application usage and location patterns of users. We present a methodology that correlates different network attributes and user information together. For user behaviors we classify all users into four groups by time...
Energy efficiency of mobile data communication systems is of significant importance. In this paper, we propose an adaptive radio connection management technique that can effectively reduce the mobile battery consumptions by intelligently reducing the radio connection tail overhead. This adaptive fast dormancy (AFD) algorithm learns the device-specific traffic behavior over time and determines the...
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